* {
    margin: 0;
    padding: 0;
    list-style: none;
}
%button{
    width: 70px;
    height: 30px;
    line-height: 30px;
    font-size: 17px;
    background:linear-gradient(to top,#034c80 50%,#3b8bc5);
    border: none;
    border-radius: 5px;
    position: absolute;
    left: 130px;
    bottom: 20px;
    color: white;
}
.box {
    width: 1500px;
    height: 70px;

    nav {
        width: 1263px;
        margin: 0 auto;
        display: flex;

        .frist {
            width: 1050px;
            display: flex;

            li {
                width: 150px;
                height: 70px;
                text-align: center;
                line-height: 70px;
                background: linear-gradient(to top, #bebebe, #fafafa);
                border: 1px solid gray;
                border-image: linear-gradient(#fff, rgba(0, 0, 0, 0.2)) 1;
                position: relative;

                &:hover {
                    background: gray;

                    .second {
                        display: block;
                        height: 280px;
                    }

                }

                .second {
                    position: absolute;
                    top: 100%;
                    left: -1px;
                    height: 0;
                    transition: all 0.3s;
                    overflow: hidden;

                    li {
                        width: 150px;
                        height: 70px;
                        text-align: center;
                        line-height: 70px;
                        background: linear-gradient(to top, #bebebe, #fafafa);
                        transition: all 0.3s;

                        &:hover {
                            background: gray;
                            transition: none;
                            border: 1px solid gray;
                        }
                    }
                }
            }
        }
    }

    .main {
        width: 1263px;
        margin: 0 auto;
        background-color: #f8f8f8;

        img {
            width: 1263px;
        }

        .center {
            width: 900px;
            margin: 0 auto;
            background-color: #f8f8f8;

            .center-center {
                width: 700px;
                margin: 0 auto;
                background-color: #f8f8f8;

                .english {
                    width: 700px;
                    height: 40px;
                    background-color: gray;
                    margin: 0 auto;
                    color: white;
                    line-height: 40px;
                    font-size: 30px;
                    font-family: 'Courier New', Courier, monospace;
                    font-style: italic;
                }

                p {
                    width: 700px;
                    color: gray;
                    font-size: 14px;
                    margin: 20px 0;
                }

                .neirong {
                    width: 700px;
                    display: flex;
                    flex-wrap: wrap;
                    justify-content: space-between;

                    .neirong1 {
                        width: 323px;
                        height: 289px;
                        position: relative;

                        img {
                            width: 323px;
                            box-shadow: 0 26px 21px -28px black;
                        }
                        button{
                           @extend %button
                        }
                    }

                    .neirong2 {
                        width: 323px;
                        height: 289px;
                        position: relative;
                        box-shadow: 0 26px 21px -28px black;

                        img {
                            width: 323px;
                            box-shadow: 0 26px 21px -28px black;
                        }
                        button{
                            @extend %button
                         }
                    }

                    .neirong3 {
                        width: 323px;
                        height: 289px;
                        position: relative;

                        img {
                            width: 323px;
                            box-shadow: 0 26px 21px -28px black;
                        }
                        button{
                            @extend %button
                         }
                    }

                    .neirong4 {
                        width: 323px;
                        height: 289px;
                        position: relative;

                        img {
                            width: 323px;
                            box-shadow: 0 26px 21px -28px black;
                        }
                        button{
                            @extend %button
                         }
                    }

                    .neirong5 {
                        width: 323px;
                        height: 289px;
                        position: relative;

                        img {
                            width: 323px;
                            box-shadow: 0 26px 21px -28px black;
                        }
                        button{
                            @extend %button
                         }
                    }
                }

            }

        }
        
        .footer-bottom{
            margin-top:-10px ;
            width:1263px ;
            height:62px ;
            background-color:#444444 ;
            display: flex;
            justify-content: space-around;
            align-items: center;
            .footer-bottom-left{
                width: 300px;
                height: 62px;
                display: flex;
                justify-content: space-around;
                align-items: center;
                color: white;
                font-size: 12px;
            }
        }
        .footer-bottom-right{
            font-size: 12px;
            color: white;
        }

    }


}